The Undertaker of course. But its still the match that I've always wanted to see. Maybe WWE and TNA can do a trade or something so Sting can wrestle for WWE for a few shows, and someone goes to TNA for a few shows.

at 'Mania? 'Taker no question. In a kayfabe "who has most left in the tank" match Sting.
I'd love to see these guys in a program they are the guys who kept me interested in wrestling as I grew up, the dark anti hero types who have both been to the very top. Realistically it's too late for it to ever happen, 'Taker is too banged up to workes more than one great match a year and I cant remember the last time Sting put on a truly great match.